为了减省,lim下面的n->+∞我就不写了,你写的时候别漏了,lim(n+1)^2/[(7n-1)(3-n)]=lim(n^2+2n+1)/(-7n^2+22n-3)=lim[(-1/7)(7n^2+14n+7)/(7n^2-22n+3)]=lim[(-1/7)(7+14/n+7/n^2)/(7-22/n+3/n^2)]n->+∞时,14/n,7/n^...
Lim下为n→无穷[(n+1)^2/(7n-1)(3-n)] =
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